I'm going to Frankfurt Germany, how do I get to the train station after landing?

Taking a taxi is useless, since there are two train stations at Frankfurt Airport.

The regional train station (Regionalbahnhof) is located in terminal 1, concourse B with tracks 1-3. You use it for local trains to Frankfurt Hbf or Wiesbaden.

The long-distance train station (Fernbahnhof) is located next to terminal 1 and can be reached by using a pedestrian bridge crossing the Autobahn (highway/motorway) A3. Trains to several German and international destinations depart from tracks 4-7.

On arrival at terminal 1 you just follow the signs for train stations.

Arriving at terminal 2 you either take the Skyline people mover or designated transit buses to get to terminal 1.

That depends on which Frankfurt you are going to Frankfurt am Main or Frankfurt an der Oder.

As there is no airport at Frankfurt an der Oder you probably mean Frankfurt Am Main in which case a train runs from the Flughafen to ther Bahnhof. There is also a long distance train station (Fernbahnhof) at the airport. This is mainly served by high speed ICE services.

Follow the Signs after you get your Luggage. There is a Train Station next to the terminal.

YOU WALK

https://www.youtube.com/watch?v=yh7_ge4Q7ko

By taking a taxi and telling them to take you to the train station.

Take a cab or a bus.